MTD/YTD parameters to a Stored Procedure

Hi guys,

I am new to SQL.

I know there are plenty of YTD/MTD sql calculations but I have been unable to pass them any of them as parameters to may Stored Procedure.

If someone can help me solve at least two of them (let's say YTD/MTD). I will do the same for the rest of parameters (QTD/WTD) following the example. Please find my current SP below.

ALTER Procedure [dbo].[DIFOT_WH]
AS
Select  CORDDocs.DateOpn AS 'CORD_DateOpen', CORDDocs.DocumentCode as 'CORD_DocumentCode', CDSPDocs.DocumentCode AS 'DESP_DocumentCode', 
	Count(CORDLines.LneType) AS 'Cord_Lines', SUM(CORDLines.Qnty) AS 'CORD_Qty', CDSPLines.Status, Count(CDSPLines.Qnty) AS 'DESP_Lines', 
	Sum(CDSPLines.Qnty) AS 'DESP_Qty', CORDDocs.DateReq AS 'CORD_DateReq', CDSPDocs.PostDate AS 'DESP_PostedDate',  
CASE 
	When SUM(CORDLines.Qnty) = Sum(CDSPLines.Qnty) THEN 'IF' ELSE 'NOT IF'
	END as 'IFOT'
From dbo.Documents AS CORDDocs INNER JOIN
	dbo.DocumentsLines AS CORDLines ON CORDDocs.DocID = CORDLines.DocID AND CORDLines.TrnType = 'L' AND CORDLines.LneType <> 'Fght' LEFT OUTER JOIN
	dbo.DocumentsLines AS CDSPLines ON CORDLines.TranID = CDSPLines.SourceID AND CDSPLines.TrnType = 'L' AND (CDSPLines.Status = 'Posted' OR CDSPLines.Status = 'Closed') LEFT OUTER JOIN
	dbo.Documents AS CDSPDocs ON CDSPLines.DocID = CDSPDocs.DocID 
WHERE (CORDDocs.DocumentName = 'DocCord')
Group by CORDDocs.DateOpn, CORDDocs.DocumentCode, CDSPDocs.DocumentCode, CORDDocs.DateReq, CDSPDocs.PostDate, CDSPLines.Status
ORDER BY CORDDocs.DateOpn,'CORD_DocumentCode'

I appreciate all your help

Thanks

Eric